libsyscall/custom/SYS.h

   1 /*
   2  * Copyright (c) 1999-2007 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1992 NeXT Computer, Inc.  All rights reserved.
  29  *
  30  *      File:   SYS.h
  31  *
  32  *      Definition of the user side of the UNIX system call interface
  33  *      for M98K.
  34  *
  35  *      Errors are flagged by the location of the trap return (ie., which
  36  *      instruction is executed upon rfi):
  37  *
  38  *              SC PC + 4:      Error (typically branch to cerror())
  39  *              SC PC + 8:      Success
  40  *
  41  * HISTORY
  42  * 18-Nov-92    Ben Fathi (benf@next.com)
  43  *      Ported to m98k.
  44  *
  45  *  9-Jan-92    Peter King (king@next.com)
  46  *      Created.
  47  */
  48
  49 #include <sys/syscall.h>
  50
  51 #ifndef SYS_setquota
  52 #define SYS_setquota    148
  53 #endif
  54 #ifndef SYS_quota
  55 #define SYS_quota       149
  56 #endif
  57
  58 #if defined(__ppc__) || defined(__ppc64__)
  59
  60 #include <architecture/ppc/mode_independent_asm.h>
  61
  62 /*
  63  * Macros.
  64  */
  65
  66 #define SYSCALL(name, nargs)                    \
  67         .globl  cerror                          @\
  68         MI_ENTRY_POINT(_##name)     @\
  69         li      r0,SYS_##name                   @\
  70         sc                          @\
  71         b       1f                      @\
  72         blr                         @\
  73 1:      MI_BRANCH_EXTERNAL(cerror)
  74
  75
  76 #define SYSCALL_NONAME(name, nargs)             \
  77         .globl  cerror                          @\
  78         li      r0,SYS_##name                   @\
  79         sc                          @\
  80         b       1f                      @\
  81         b       2f                      @\
  82 1:      MI_BRANCH_EXTERNAL(cerror)  @\
  83 2:
  84
  85
  86 #define PSEUDO(pseudo, name, nargs)             \
  87     .private_extern  _##pseudo           @\
  88     .text                       @\
  89     .align  2                   @\
  90 _##pseudo:                      @\
  91         SYSCALL_NONAME(name, nargs)
  92
  93 #define __SYSCALL(pseudo, name, nargs)  \
  94     PSEUDO(pseudo, name, nargs) @\
  95     blr
  96
  97 #elif defined(__i386__)
  98
  99 #include <architecture/i386/asm_help.h>
 100 #include <mach/i386/syscall_sw.h>
 101
 102 /*
 103  * We have two entry points. int's is used for syscalls which need to preserve
 104  * %ecx across the call, or return a 64-bit value in %eax:%edx. sysenter is used
 105  * for the majority of syscalls which just return a value in %eax.
 106  */
 107
 108 #define UNIX_SYSCALL_SYSENTER           call __sysenter_trap
 109 #define UNIX_SYSCALL(name, nargs)                       \
 110         .globl  cerror                                  ;\
 111 LEAF(_##name, 0)                                        ;\
 112         movl    $ SYS_##name, %eax                      ;\
 113         UNIX_SYSCALL_SYSENTER                           ;\
 114         jnb     2f                                      ;\
 115         BRANCH_EXTERN(cerror)                           ;\
 116 2:
 117
 118 #define UNIX_SYSCALL_INT(name, nargs)                   \
 119         .globl  cerror                                  ;\
 120 LEAF(_##name, 0)                                        ;\
 121         movl    $ SYS_##name, %eax                      ;\
 122         UNIX_SYSCALL_TRAP                               ;\
 123         jnb     2f                                      ;\
 124         BRANCH_EXTERN(cerror)                           ;\
 125 2:
 126
 127 #if defined(__SYSCALL_32BIT_ARG_BYTES) && ((__SYSCALL_32BIT_ARG_BYTES >= 4) && (__SYSCALL_32BIT_ARG_BYTES <= 20))
 128 #define UNIX_SYSCALL_NONAME(name, nargs)                        \
 129         movl    $(SYS_##name | (__SYSCALL_32BIT_ARG_BYTES << I386_SYSCALL_ARG_BYTES_SHIFT)), %eax               ;\
 130         UNIX_SYSCALL_SYSENTER                                   ;\
 131         jnb     2f                                              ;\
 132         BRANCH_EXTERN(cerror)                                   ;\
 133 2:
 134 #else /* __SYSCALL_32BIT_ARG_BYTES < 4 || > 20 */
 135 #define UNIX_SYSCALL_NONAME(name, nargs)                \
 136         .globl  cerror                                  ;\
 137         movl    $ SYS_##name, %eax                      ;\
 138         UNIX_SYSCALL_SYSENTER                           ;\
 139         jnb     2f                                      ;\
 140         BRANCH_EXTERN(cerror)                           ;\
 141 2:
 142 #endif
 143
 144 #define UNIX_SYSCALL_INT_NONAME(name, nargs)            \
 145         .globl  cerror                                  ;\
 146         movl    $ SYS_##name, %eax                      ;\
 147         UNIX_SYSCALL_TRAP                               ;\
 148         jnb     2f                                      ;\
 149         BRANCH_EXTERN(cerror)                           ;\
 150 2:
 151
 152 #define PSEUDO(pseudo, name, nargs)                     \
 153 LEAF(_##pseudo, 0)                                      ;\
 154         UNIX_SYSCALL_NONAME(name, nargs)
 155
 156 #define PSEUDO_INT(pseudo, name, nargs)                 \
 157 LEAF(_##pseudo, 0)                                      ;\
 158         UNIX_SYSCALL_INT_NONAME(name, nargs)
 159
 160 #define __SYSCALL(pseudo, name, nargs)                  \
 161         PSEUDO(pseudo, name, nargs)                     ;\
 162         ret
 163
 164 #define __SYSCALL_INT(pseudo, name, nargs)              \
 165         PSEUDO_INT(pseudo, name, nargs)                 ;\
 166         ret
 167
 168 #elif defined(__x86_64__)
 169
 170 #include <architecture/i386/asm_help.h>
 171 #include <mach/i386/syscall_sw.h>
 172
 173 #define UNIX_SYSCALL_SYSCALL    \
 174         movq    %rcx, %r10              ;\
 175         syscall
 176
 177 #define UNIX_SYSCALL(name, nargs)                       \
 178         .globl  cerror                                  ;\
 179 LEAF(_##name, 0)                                        ;\
 180         movl    $ SYSCALL_CONSTRUCT_UNIX(SYS_##name), %eax      ;\
 181         UNIX_SYSCALL_SYSCALL                            ;\
 182         jnb     2f                                      ;\
 183         BRANCH_EXTERN(cerror)                           ;\
 184 2:
 185
 186 #define UNIX_SYSCALL_NONAME(name, nargs)                \
 187         .globl  cerror                                  ;\
 188         movl    $ SYSCALL_CONSTRUCT_UNIX(SYS_##name), %eax      ;\
 189         UNIX_SYSCALL_SYSCALL                            ;\
 190         jnb     2f                                      ;\
 191         BRANCH_EXTERN(cerror)                           ;\
 192 2:
 193
 194 #define PSEUDO(pseudo, name, nargs)                     \
 195 LEAF(_##pseudo, 0)                                      ;\
 196         UNIX_SYSCALL_NONAME(name, nargs)
 197
 198 #define __SYSCALL(pseudo, name, nargs)                  \
 199         PSEUDO(pseudo, name, nargs)                     ;\
 200         ret
 201
 202 #else
 203 #error Unsupported architecture
 204 #endif